diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4ff777..ff4ae54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.5.4](https://github.com/googleapis/python-managed-identities/compare/v1.5.3...v1.5.4) (2022-10-07)
+
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 3.19.5 ([#185](https://github.com/googleapis/python-managed-identities/issues/185)) ([3818154](https://github.com/googleapis/python-managed-identities/commit/381815414a1cfc480d5b7b3810fd6a1ab7d452f7))
+
 ## [1.5.3](https://github.com/googleapis/python-managed-identities/compare/v1.5.2...v1.5.3) (2022-09-29)
 
 
diff --git a/setup.py b/setup.py
index 840cd1d..73a0f80 100644
--- a/setup.py
+++ b/setup.py
@@ -21,14 +21,14 @@
 import setuptools  # type: ignore
 
 name = "google-cloud-managed-identities"
-version = "1.5.3"
+version = "1.5.4"
 description = "Managed Service for Microsoft Active Directory API client library"
 release_status = "Development Status :: 5 - Production/Stable"
 url = "https://github.com/googleapis/python-managed-identities"
 dependencies = [
     "google-api-core[grpc] >= 1.32.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*",
     "proto-plus >= 1.22.0, <2.0.0dev",
-    "protobuf >= 3.20.2, <5.0.0dev",
+    "protobuf>=3.19.5,<5.0.0dev,!=3.20.0,!=3.20.1,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
 ]
 
 package_root = os.path.abspath(os.path.dirname(__file__))
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index bc6059c..a12652c 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -21,4 +21,4 @@
 # Then this file should have foo==1.14.0
 google-api-core==1.32.0
 proto-plus==1.22.0
-protobuf==3.20.2
+protobuf==3.19.5